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PostPosted: Wed Jun 12, 2013 4:47 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Thu Apr 10, 2008 4:16 pm
Posts: 9609
Location: brigg, home of the gypsies
I have a 200 litre, 3hp sealey compressor at my disposal and am considering buying a sandblasting set up.

any thoughts on this? i know its cheap but I cant justify much more as its a bit of a gamble really.

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... AQ:GB:1123

also any ideas what media to use, primarily going to be removing powder coat from alloy so nneeds to be tough enough, but not too tough!


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PostPosted: Wed Jun 12, 2013 6:02 pm 
Dirt Disciple
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Joined: Thu May 26, 2011 9:26 pm
Posts: 87
Location: Halesowen, West Midlands
It might manage cleaning small parts but powder coat off a frame.... I fear you'll be sorely disappointed!

Your 3 hp Seeley might push out 10 cfm on a good day, they quote 6-25 cfm to operate the blaster buy my experience of these hobby blasters is they perform poorly even with an excess of cfm. You also need a really good water trap and keep your medium well filtered.

I used to run a production blaster off a 150cfm screw compressor and even then more air would have been better.


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PostPosted: Wed Jun 12, 2013 6:40 pm 
retrobike rider
retrobike rider
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Joined: Sun Feb 19, 2012 10:08 am
Posts: 6852
Location: Nth Somerset, UK
Bit disappointed now, as I was going to tell you all about my experiences with shaped charges. :shock: :wink:


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PostPosted: Wed Jun 12, 2013 7:34 pm 
Retro Guru
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Joined: Fri Sep 19, 2008 4:37 pm
Posts: 5198
Location: North West
If the powder coat is stuck really well, you will damage the alloy from the areas that you have removed the powder coat, whilst trying to finish the areas that still have powder coat on them ... :-(

WD :D


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PostPosted: Thu Jun 13, 2013 5:20 am 
Retro Guru
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Joined: Fri Jan 13, 2012 2:28 am
Posts: 1058
Location: Near Gatwick
I agree with everything in the posts above.
Chemical stripper is the way to go.
I lightly blast to give a key for the powder/paint.


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PostPosted: Thu Jun 13, 2013 5:48 pm 
Old School Grand Master
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Joined: Wed Jul 25, 2007 2:04 pm
Posts: 3364
Location: Completely in the dark, thanks to me good mate Terry....
NeilM wrote:
Bit disappointed now, as I was going to tell you all about my experiences with shaped charges. :shock: :wink:


Inevitably that gives me a lame excuse to post this:

http://www.youtube.com/watch?v=7_PX1cVuaVA

;)

David


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PostPosted: Fri Jun 14, 2013 10:46 pm 
Old School Grand Master
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Joined: Sun Sep 05, 2010 1:10 am
Posts: 4756
Location: Heathfield, East Sussex
PETN gets the job done more effectively for less... 8)

(Hopefully some nerd at GCHQ won't see that's a PIT! :facepalm: )


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